[PATCH] airo : WE-19 support

	Dan Williams already included most parts of my WE-19 patch for
the airo driver in the kernel. There was just a few bits he could not
do because WE-19 itself was not in the kernel. Those are the missing
bits.
        Tested with 2.6.13 (with real HW).

Signed-off-by: Jean Tourrilhes <jt@hpl.hp.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>